Recently I wrote an article ((t is in Russian) regarding Linux sound, and a person named webhamster mentioned that he has a problem with Audacity. Each time he tries to record an audio track there is approximately 30% chance that it won’t record.
I asked him to reproduce this problem, and here it is: http://www.youtube.com/watch?v=kKQf-09lBUo
Go to ~4:30, the failure is shown on the video.
According to the comments to my article this bug is at least reproducible in Debian Stable (Squeeze) and Ubuntu 12.04. Maybe it is somehow related to the used audio card (one of the reporters uses ESI Juli@, but, in another hand, I have this audio card, too, and such error doesn’t happen on my machine).
Anyway, thanks for checking that out.